What is required to ensure safe use of a file?

Using a file correctly requires the use of a file handle to ensure safety and efficiency. The file handle provides a secure grip on the tool, helping to maintain control while working. This is particularly important because files can exert significant force during use, and a proper handle minimizes the risk of slipping or losing control, which could lead to injury.

While other options, such as sturdy benches, safety gloves, and protective masks, may offer various safety benefits in a workshop setting, they do not specifically address the need for control and precision when using a file. The primary function of the file handle is to enhance grip and stability, making it a crucial component in the safe operation of a file. Therefore, utilizing a file handle is key to performing filing tasks effectively and safely.